What Is an IP Address?
An IP address (Internet Protocol address) is a unique numeric identifier assigned to every device connected to the internet. Think of it like a phone number — it lets devices locate and communicate with each other across networks.
IP addresses serve two core purposes:
- Identification – who you are on the network
- Routing – how data finds your device
Currently, two versions of IP addresses are in use: IPv4 and IPv6. Let’s dive into their differences, why IPv6 is growing in importance, and how it affects proxy users like you.
What Is IPv4?
IPv4 is the fourth version of the Internet Protocol. Introduced in the early 1980s, it uses 32-bit numeric addresses, typically displayed as four numbers separated by dots:
Example: 192.168.0.1
IPv4 allows for around 4.3 billion unique IP addresses. This was once considered more than enough — until mobile, IoT, and cloud computing exploded.
IPv4 Exhaustion: Why It Matters
The global pool of IPv4 addresses officially ran out in 2011. While most of the internet still runs on IPv4 today, providers now rely heavily on:
- NAT (Network Address Translation)
- IP reallocation & reuse
- Proxy networks
What Is IPv6?
IPv6 is the sixth and most recent version of the Internet Protocol. It was created in 1998 as a long-term solution to address depletion.
It uses 128-bit alphanumeric addresses, written in hexadecimal and separated by colons:
Example: 2001:0db8:85a3:0000:0000:8a2e:0370:7334
IPv6 supports a virtually limitless number of addresses — (3.4 x 10³⁸). It's designed for the modern internet: faster, more scalable, and more secure.
